We have an issue where delegates are still receiving invites for mailboxes they are no longer delegates for. Having checked in Powershell for 365, the delegates are not showing as having calendar permissions. Locally on the Mac 2011 client the delegates are also not showing. Added to this, the removed delegate who shouldn't be receiving emails receives an invite but is unable to accept / decline.

I have a call logged with Microsoft but am interested to see if anyone has experienced a similar issue.

Thanks.